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PermissionGacha/xp.go

100 lines
2.2 KiB
Go

package main
import (
"database/sql"
"math"
"sync"
"time"
"github.com/bwmarrin/discordgo"
_ "github.com/mattn/go-sqlite3"
)
var db *sql.DB
var lastMessage = make(map[string]time.Time)
var incrementMutex = sync.Mutex{}
var levelUpRequirementCache [30]int
func init() {
var err error
db, err = sql.Open("sqlite3", "./bot.db")
if err != nil {
panic(err)
}
db.SetMaxOpenConns(1)
db.Exec("CREATE TABLE xp(id STRING NOT NULL UNIQUE, xp INTEGER NOT NULL)")
for i := 1; i <= 30; i++ {
//Constructed on Desmos:
//y=2^{\frac{x}{3}}+.1x^{2}+1.2x-1
fi := float64(i)
levelUpRequirementCache[i-1] = int(10000 * (math.Pow(2, fi/3) + 0.1*fi*fi + 1.2*fi - 1))
}
}
func incrementXP(dg *discordgo.Session, discordID string) {
amountToIncrement := calculateIncrement(discordID)
tx, err := db.Begin()
if err != nil {
logError(dg, "incrementXP", "begin", discordID, err)
return
}
_, err = tx.Exec("INSERT INTO xp(id, xp) VALUES(?, ?) ON CONFLICT(id) DO UPDATE SET xp = xp+?;", discordID, amountToIncrement, amountToIncrement)
if err != nil {
logError(dg, "incrementXP", "insert", discordID, err)
tx.Rollback()
return
}
err = tx.Commit()
if err != nil {
logError(dg, "incrementXP", "commit", discordID, err)
return
}
addToRoleQueue(discordID)
}
func getLevelAndXP(dg *discordgo.Session, discordID string) (int, int) {
rows, err := db.Query("SELECT xp FROM xp WHERE id=?", discordID)
if err != nil {
logError(dg, "getLevelAndXP", "select", discordID, err)
return 1, 0
}
defer rows.Close()
if rows.Next() {
var xp int
rows.Scan(&xp)
return convertXPIntoLevel(xp)
}
return 1, 0
}
func calculateIncrement(discordID string) int {
incrementMutex.Lock()
defer incrementMutex.Unlock()
now := time.Now()
delta := now.Sub(lastMessage[discordID])
lastMessage[discordID] = now
if delta.Seconds() < 0 {
return 0
}
//Constructed on Desmos:
//y=\frac{100}{\left(1+e^{-\left(\frac{x-15}{3}\right)}\right)}
return int(100 / (1 + math.Pow(math.E, -((delta.Seconds()-15)/3))))
}
func convertXPIntoLevel(xp int) (int, int) {
if xp < levelUpRequirementCache[0] {
return 1, xp
}
for i := 0; i < 30; i++ {
if levelUpRequirementCache[i] > xp {
return i + 1, xp - levelUpRequirementCache[i-1]
}
}
return 30, xp - levelUpRequirementCache[29]
}